"Migraine also has been suggested as a possible mechanism since previous studies have found a higher prevalence of migraine headache in TGA cases (23%) as compared to TIA (9%) and normal controls (6%) (Hodges and Warlow, 1990b; Zorzon et al., 1995). A possible explanation for migraine as an etiology for TGA may be transient spreading depression of the bilateral hippocampi (Evans and Lewis, 2005). In our study none of the cases had history of migraine or subsequent migraine following the TGA events. "
[Show abstract][Hide abstract] ABSTRACT: Background/objective: Transient global amnesia (TGA) is a temporary amnestic syndrome characterized by lack of other focal neurological deficits. Cerebrovascular disease, migraine and seizures have been suggested as underlying mechanisms. TGA may be a risk factor for cerebrovascular or other neurological events. We studied the relation of TGA, vascular risk factors, brain magnetic resonance imaging (MRI) indices of subclinical ischemia and neurological events in a community-based sample.
Design/setting: A total of 12 TGA cases were ascertained using standard criteria by experienced neurologists, and matched to 41 stroke- and seizure-free controls. Vascular risk factors, brain MRI findings, and subsequent cerebrovascular or seizure events were compared in cases and controls.
Participants: Framingham Heart Study (FHS) original and offspring cohort participants were included.
Results: No significant differences between the groups were observed in the prevalence of vascular risk factors, or brain MRI measures. Few incident stroke/transient ischemic attacks (TIA) (one event among the cases and four in controls) or subsequent seizures occurred in either group. Head CT during the acute event (n = 11) and brain MRI (n = 7) were negative for acute abnormalities. Electroencephalograms (EEG) (n = 5) were negative for epileptiform activity. Extracranial vascular studies were negative for significant stenosis in all cases.
Conclusion: In our community-based study TGA was not related to traditional vascular risk factors, or cerebrovascular disease. However, our study is limited by small sample size and power, and larger studies are required to exclude an association.
Frontiers in Neurology 05/2013; 4:47. DOI:10.3389/fneur.2013.00047
[Show abstract][Hide abstract] ABSTRACT: This book presents papers on the ethical aspects of nuclear weapons. Topics considered include the concept of a ''just'' war, national defense, political aspects, religion and politics, the failure of deterrence, conventional warfare, nuclear deterrence and democratic politics, the future of the nuclear debate, non-proliferation policy, arms control, national security, and government policies.
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